Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6c50f73d81163db…

MALICIOUS

PDF

42.8 KB Created: 2020-10-06 20:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: c45d222e502a6b21392417c408f41023 SHA-1: 5e4aeeff71d53d6817e0971ed632d0fa7809912e SHA-256: b6c50f73d81163dbf5cc62c270ca029b9cd3d6334fc07c7725b09c3e40dbb685
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/pify?keyword=velocity+time+graphs+worksheet+2-5 In PDF document text
    • https://site-1042013.mozfiles.com/files/1042013/56227151116.pdfIn PDF document text
    • https://site-1036764.mozfiles.com/files/1036764/zipimositijozaze.pdfIn PDF document text
    • https://site-1037073.mozfiles.com/files/1037073/39069657846.pdfIn PDF document text
    • http://fafedeki.sergeseiden.com/uploads/1/3/2/7/132710497/94b9726b002.pdfIn PDF document text
    • http://files.mvnighthawkbasketball.com/uploads/1/3/0/9/130968913/67d1b0ebc85.pdfIn PDF document text
    • http://files.atlasprimeproperties.com/uploads/1/3/2/6/132696117/kijojakuridik-jafarunofilek.pdfIn PDF document text
    • https://site-1048275.mozfiles.com/files/1048275/xulebikoboxenupala.pdfIn PDF document text
    • https://site-1042734.mozfiles.com/files/1042734/rutemipawuzisabetijusej.pdfIn PDF document text
    • https://site-1037275.mozfiles.com/files/1037275/85841372050.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2996/2141/files/kirunetamojofatusijakeku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5475/9069/files/61356708760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6993/1172/files/itube_apk_ios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4155/3046/files/demon_the_descent_storytellers_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3335/7209/files/65419619180.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6782 5856 bytes
SHA-256: 1c1500ec275d28edce3d4a1df0fc30c980d9c9e5500d5d50fc3de7e19d72fd1e
font_01_sfnt_off00007b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B71 10280 bytes
SHA-256: 7e6b19d1aec1aa05ace4d4e92bffcbd2c80ac1131fc17988b72d6a6fc140e539

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